Allow jobs to show parameters in the UI (#601)

* Allow jobs to show parameters in the UI

This is very useful when starting the same job multiple times with
different configurations.

This PR allows to show parameters as arbitrary data since jobs might use
any kind of data.

* Use same method of pretty printing everywhere

pygeoapi/api.py

@@ -2006,6 +2006,7 @@ tiles/{{{}}}/{{{}}}/{{{}}}/{{{}}}?f=mvt'
                 'status': job_['status'],
                 'message': job_['message'],
                 'progress': job_['progress'],
+                'parameters': job_.get('parameters'),
                 'job_start_datetime': job_['job_start_datetime'],
                 'job_end_datetime': job_['job_end_datetime']
             }

pygeoapi/templates/processes/jobs/job.html

@@ -23,6 +23,15 @@
                 <h3>Message</h3>
                 <p>{{ data['jobs']['message'] }}</p>
               </div>
+              {% if data['jobs']['parameters'] %}
+              <div class="message">
+                <h3>Parameters</h3>
+                <pre id="job-parameters"></pre>
+              </div>
+              <script>
+                document.getElementById('job-parameters').innerHTML = JSON.stringify({{ data['jobs']['parameters']}}, undefined, 2);
+              </script>
+              {% endif %}
               <div class="duration">
                 <h4><label for="progress">Progress</label></h4>
                 <progress id="progress" class="inline" value="{{ data['jobs']['progress']|int*10 }}" max="1000"></progress>